The email idea is a good one, and as my husband mentioned, simply ask. The worst that can happen is, your partner will say no.

As my husband says, we came here for our daughter. Again there was no particular story to it, I read here for quite a while before joining, then decided I also wanted to contribute, as my daughter was quite active here however not speaking to either of us much. She was fairly non-verbal at that time and communicated with us largely through the forum. A year later and she is much improved, her PTSD is managed far better and we speak to her offline for the most part now. However the forum was a tremendous help to us through the rough patches, and continues to be a source of support when we need it. I do hope your husband decides to join as there is much support and information to be had here.